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Broadband over Power lines. by Jayesh Chi Bun Mummoorthy CS 536 – October 22, 2004. Broadband over power lines (BPL). FCC approved last week: power utilities free to carry data on electrical wires to provide broadband services Benefits

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broadband over power lines

Broadband over Power lines

by

Jayesh

Chi Bun

Mummoorthy

CS 536 – October 22, 2004

broadband over power lines bpl
Broadband over power lines (BPL)
  • FCC approved last week: power utilities free to carry data on electrical wires to provide broadband services
  • Benefits
    • Better coverage than phone and cable (e.g. small towns and rural areas)
    • Faster deployment
    • May lower the price
  • Challenges
    • EM interference to various radio signals
      • System to monitor interference,
      • Restrict service in areas where could affect public safety
    • High-voltage and fluctuation can corrupt data
      • Clean data stream if power down to 7000V
how stuff works
How Stuff Works?
  • Medium
    • Fibers / Phone lines (to skip disruptive high-voltage lines)
    • Medium voltage wires
  • PHY
    • RF (bundled w/ AC)
    • 4.3MHz – 20.9MHz
    • 84 carriers
    • OFDM
  • MAC
    • CSMA/CA
    • virtual carrier sense
    • contention resolution
    • Encoding: DQPSK
    • Error detection/correction: FEC, ARQ
how stuff connected
How Stuff Connected?
  • How to plug in?
    • Wireless router on poles
    • Special adaptor/modem plugged into electrical outlets
  • Data rates
    • Homeplug Powerline Alliance: 14Mbps
    • Amperion: currently 20Mbps, 100Mbps next year
    • CVEC: claims 256Mbps bidirectionally
  • Prices
    • Amperion: $19/mo
    • Home n/w device: $25

Wall-plugged Ethernet Bridge

the future
The future
  • Home network
    • Easily create a network via electric outlets
  • Smart electrical grids and devices
    • Read electrical usage
    • Diagnose maintenance problems and feed back
    • Traffic lights, surveillance cams networked instantly
    • Control power use
comments on the article the topic
Comments on the article & the topic
  • Pros
    • Impact of BPL to broadband providers
    • Provided estimated cost of services
    • Proposed idea of smart electrical devices
  • Cons
    • No technical details about data transmission mechanism over power line
    • No discussion of safety and security
  • Our Opinions
    • +: Alternative to existing network infrastructure
    • +: Opportunity for smart devices
    • -: More trials and testing needed
    • -: Interference problems?
    • -: More at the hands of nature: Rain, Snow, ..
    • -: New medium: Properties of Aluminum wires???
    • -: Will it survive the opposition:
      • ARRL(163,000), FEMA, DERA & many more …
how stuff messed up
How Stuff Messed Up?

Short wave/CB: 5.9MHz – 27.41Mhz

Affected FEMA (emergency), ARRL (relay radio)

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